EP 0539228 B1 19971217 - Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it
Title (en)
Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it
Title (de)
Magneto-optische Speichereinrichtung mit Überschreiben durch Lichtintensitätsmodulation und Verfahren zur Aufzeichnung und zum Löschen durch deren Gebrauch.
Title (fr)
Dispositif de mémoire magnétooptique sur lequel l'opération de surécriture peut être faite par modulation de l'intensité lumineuse et méthode pour eregistrer et enfacer avec une telle dispositif.
Publication
Application
Priority
JP 27929791 A 19911025
Abstract (en)
[origin: EP0539228A2] A magneto-optical memory device is provided with a recording track having a recording film and a guide track wherein a perpendicular magnetic film, whose magnetization direction is arranged in one direction, is formed, the recording track and the guide track being alternately disposed. A recording operation is carried out using a circular magnetic field generated from the perpendicular magnetic film by projecting a light beam only on the recording track so as to raise the temperature of the recording film. When erasing, the light beam is projected on the recording track and respective portions of the guide tracks located on both sides of the recording track so as to raise the temperature thereof. As the temperature rises, the magnetization of the perpendicular magnetic film becomes smaller, and an erasing operation is therefore performed using an external magnetic field. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 11/10 (2006.01); G11B 11/105 (2006.01)
CPC (source: EP KR US)
G11B 11/10504 (2013.01 - EP US); G11B 11/10517 (2013.01 - EP US); G11B 11/10584 (2013.01 - EP US); G11B 13/04 (2013.01 - KR)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0539228 A2 19930428; EP 0539228 A3 19931020; EP 0539228 B1 19971217; CA 2081153 A1 19930426; CA 2081153 C 19960528; DE 69223591 D1 19980129; DE 69223591 T2 19980618; JP 2790553 B2 19980827; JP H05120749 A 19930518; KR 930008767 A 19930521; KR 950013706 B1 19951113; US 5425008 A 19950613
DOCDB simple family (application)
EP 92309751 A 19921023; CA 2081153 A 19921022; DE 69223591 T 19921023; JP 27929791 A 19911025; KR 920019417 A 19921022; US 96535892 A 19921023